Revolving chair.



Patented Sept. I7, [90L J. M. GERMANSUN.

REVULVING CHAIR.

(Appliegtion filed Sept. 5, 1899.)

2 Sheets-Sheet I,

(No Model.)

aZA/ 0 No. 682,795. Patented Sept. l7, 190i.

JIM. esnmnson. R EVOLV|NG CHAIR.

(Application filed Sept. 5, 1899.)

(No Model.) 2 Sheets-Sheet 2.

' @wwm Mwz- 2M? @ZM I R FETERS c0. PHOTILUTMO...WASNINQYON-, 0.1::

UNITED STATES PATENT @FFICE.

JULIUS M. GERMANSON, or MILWAUKEE, Wisconsin, ASSlGNOR TO WESTERN MALLEABLE AND GREY IRON MANUFACTURING COM- PANY, OF SAME PLACE.

REVOLVING came.

srnclriemion forming part of Letters sate-at 682,795, dated September 17,

Application filed "September 5, 1"899. Serial lilo. 729,451. (No model.)

spindle in the hub of the base does not affect the vertical adjustment of the chair-seat.

The main object of the invention is to simplify and improve the construction and operation of devices of this class; and it consists in certain novel features of construction and in the arrangement and combination of parts hereinafter particularly described, and defined in the claims.

In the accompanying drawings like letters designate the same parts in the several figures.

Figure 1 is a view, partly in side elevation and partly in vertical medial section, of chairirons embodying my improvements. Figs. 2, 8, and 4 are cross-sections indicated by the dotted lines 2 2, 3 3, and 4: 4, respectively, on Fig. 1; and Fig. 5 is a side elevation of the chair irons viewed from the left with reference to Fi A designates the hub, which, with the legs 13 B attached thereto, constitutes the base of thereof in planes the chair. The hub is formed with a plain vertical bore and on the upper end with an inturned segmental flange or lug It.

C is a screw-threaded spindle fitted to turn freely and to be adjusted vertically without turningin the bore of said hub. It is provided at its upper end with a head or standard D. This head or standard may be conveniently secured on the upper end of said spindle, which is preferably turned down or reduced in diameter, as shown, by means of a collar d, formed on the lower end of said head or standard. To this head or standard the spider 0r seat-supporting. frame of the chair is pivoted or otherwise attached in the usual or any suitable manner. E is a nut'fitted on said spindle and formed at its lower end with be omitted and the lower end of an outwardly-projecting annular flange or shoulder e, which is adapted to pass on one side under the inturned flange or lug a on the hu'b'a'ud' to hold said nut in revoluble engagement with said hub. For convenience in adjusting the chair-seat vertically the nut is formed or provided at its upper end with a hand-wheel F.

G is a catch for locking the spindle O and the nut E together, so as to prevent any change in the vertical adjustment of the spindle in the hub by the turning of the spindle in the ordinary use of the chair. This catch is preferably made in the shape of a straight square bar which passes through and slides side of the bore of the collar at next to the spindle C, as clearly shown in Figs. 1, 2, and

with a tooth which is adapted to engage with an opening in the upper end of the nut E or in the hand wheel F, and just above said wardly-projecting thumb-piece g for lifting it out of engagement with said nut or handwheel. At its upper end it is formed, as shown in Figs. 1 and 5, with one or more lateral projections g, which when it is raised to ed to engage with a ledge d on the head or of operative position, so as to permit of turning the hand-wheel and nut on the spindle, and thus raising and lowering the spindle in the hub. The projections g may, however, the catch lifted above and carried inwardly upon the shoulder near the upper end of the spindle to hold it up out of engagement with the nut or hand-wheel. These projections, howeve serve the additional purpose of holding the catchin place and preventing its detachment and loss when the spindle is removed from the hub and nut or when it is turned up out hub may be formed with shown in Figs. 1, 3, and 5.

The'construction her freely in a vertical opening or groove in one.

the limit of its upward movement are adapt-.

.4. It is formed or provided at its lower end tooth it is formed or provided with an outstandard, and thereby hold said catch up out p I addition to the advantages above mentioned, requires little or no machine or hand work, involves few parts, and is consequently simple and economical to make.

The minor details of construction may be variously modified without affecting the desired results secured by my improvements and without departing from the spirit and intended scope of my invention.

I claim- 1. The combination with the hub of a chairbase havinga smooth bore, of athreaded spindle fitted to turn freely in said hub, a nut provided with an opening and revolubly connected with said hub in engagement with the thread on said spindle, and a vertically-movable gravity-oatch carried by said spindle and adapted when raised and turned with the spindle opposite the opening in said nut to drop into engagement therewith and lock the nut upon said spindle, substantially as described.

2. The combination with the hub of a chairbase having a smooth bore, of a threaded spindle adapted to turn freely in said hub, a nut adapted to engage the thread on said spindle and revolubly connected with said hub, a vertically-movable catch carried by said spindle and adapted when released to drop into engagement with said nut and to lock the same upon said spindle, and means for holding said catch up out of locking position, substantially as described.

3. The combination with the hub of a chairbase having asmooth bore, of athreaded spindle fitted to turn freely in the bore of said hub and provided with a head having a vertical opening, a nut fitted to engage with said spindle and revolubly connected with said hub, and a locking-bar movable endwise in the opening of said head into and out of engagement with said nut and provided with an outwardly-projecting handle for lifting it out of engagement with the nut, substantially as described.

In witness whereof I hereto affix my signature in presence of two witnesses.

JULIUS M. GERMANSON.

Witnesses:

CHAS. L. Goss, W. J. FAIRBAIRN 

